適用於 Adobe® Flash® Platform 的 ActionScript® 3.0 參考
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flashx.textLayout.events 

FlowOperationEvent  - AS3

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全域常數
全域函數
運算子
陳述式、關鍵字和指令
特殊類型

附錄

新增內容
編譯器錯誤
編譯器警告
執行階段錯誤
移轉至 ActionScript 3
支援的字元集
僅限 MXML 標籤
移動 XML 元素
Timed Text 標籤
不建議元素清單
AccessibilityImplementation 常數
如何使用 ActionScript 範例
法律聲明
套件flashx.textLayout.events
類別public class FlowOperationEvent
繼承FlowOperationEvent Inheritance Event Inheritance Object

語言版本: ActionScript 3.0
執行階段版本: Flash Player 10, AIR 1.5

在作業開始之前及作業完成之後,TextFlow 實體會立即傳送此事件。雖然在這兩個情況下傳送的事件物件是 FlowOperationEvent 的實體,不過在作業之前以及之後傳送的事件,在許多方面有所不同。

在執行任何作業之前,TextFlow 物件會傳送 type 屬性設定為 FlowOperationEvent.FLOW_OPERATION_BEGIN 的 FlowOperationEvent。 您可以核取 operation 屬性,判斷即將開始的作業類型。FLOW_OPERATION_BEGIN 類型的事件是可以取消的,也就是說,如果您決定作業不應該繼續進行,您可以呼叫 Event.PreventDefault() 以取消作業。如果您取消作業,就不會執行作業且不會傳送 FLOW_OPERATION_END 事件。您也可以選擇在觸發事件的作業完成前,回呼 EditManager 以執行其他作業。如果您這樣做,則在事件處理常式中所起始的作業,會透過觸發事件的作業還原為單一作業。

如果您允許作業繼續進行,TextFlow 會在作業完成時,傳送 type 屬性設定為 FlowOperationEvent.FLOW_OPERATION_END 的 FlowOperationEvent。此事件在 Flash Player 擲出可能因為作業結果而發生的任何錯誤之前傳送。這讓您在 Flash Player 擲出錯誤之前,有處理錯誤的機會。您可以透過該事件的 error 屬性存取錯誤。如果您選擇在事件處理常式中處理錯誤,您可以呼叫 Event.preventDefault() 以取消 FLOW_OPERATION_END 事件,避免 Flash Player 擲出錯誤。您也可以選擇回呼 EditManager 以執行額外的作業。如果您這樣做,產生的作業會還原為觸發事件作業的個體。

檢視範例

相關 API 元素



公用屬性
 屬性定義自
 Inheritedbubbles : Boolean
[唯讀] 指出事件是否為反昇事件。
Event
 Inheritedcancelable : Boolean
[唯讀] 指出是否可避免與事件相關聯的行為指令。
Event
 Inheritedconstructor : Object
類別物件的參照或是特定物件實體的建構函數。
Object
 InheritedcurrentTarget : Object
[唯讀] 正主動使用事件偵聽程式處理 Event 物件的物件。
Event
  error : Error
在作業期間擲出的錯誤 (若錯誤存在)。
FlowOperationEvent
 InheritedeventPhase : uint
[唯讀] 事件流程中的目前階段。
Event
  level : int
多個作業經由巢狀結構可合併為複合作業。
FlowOperationEvent
  operation : FlowOperation
即將開始或剛結束的作業。
FlowOperationEvent
 Inheritedtarget : Object
[唯讀] 事件目標。
Event
 Inheritedtype : String
[唯讀] 事件類型。
Event
公用方法
 方法定義自
  
FlowOperationEvent(type:String, bubbles:Boolean = false, cancelable:Boolean = false, operation:FlowOperation = null, level:int = 0, error:Error = null)
建立包含流程作業資訊的事件物件。
FlowOperationEvent
 Inherited
複製 Event 子類別的實體。
Event
 Inherited
formatToString(className:String, ... arguments):String
公用程式函數,可用來實作自訂 ActionScript 3.0 Event 類別中的 toString() 方法。
Event
 Inherited
指出物件是否有已定義的指定屬性。
Object
 Inherited
檢查是否已經對事件呼叫 preventDefault() 方法。
Event
 Inherited
指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。
Object
 Inherited
如果可以取消事件的預設行為指令,則取消該行為指令。
Event
 Inherited
指出指定的屬性是否存在,以及是否可列舉。
Object
 Inherited
為迴圈作業設定動態屬性的可用性。
Object
 Inherited
避免處理事件流程中,目前節點以及任何後續節點中的任何事件偵聽程式。
Event
 Inherited
避免處理接續在事件流程中的目前節點之後,後續節點中的任何事件偵聽程式。
Event
 Inherited
傳回代表此物件的字串,根據地區特定慣例進行格式化。
Object
 Inherited
傳回包含 Event 物件所有屬性的字串。
Event
 Inherited
會傳回指定之物件的基本值。
Object
公用常數
 常數定義自
  FLOW_OPERATION_BEGIN : String = "flowOperationBegin"
[靜態] 定義 flowOperationBegin 事件物件的 type 屬性值。
FlowOperationEvent
  FLOW_OPERATION_COMPLETE : String = "flowOperationComplete"
[靜態] 定義 flowOperationComplete 事件物件的 type 屬性值。
FlowOperationEvent
  FLOW_OPERATION_END : String = "flowOperationEnd"
[靜態] 定義 flowOperationEnd 事件物件的 type 屬性值。
FlowOperationEvent
屬性詳細資訊

error

屬性
error:Error

語言版本: ActionScript 3.0
執行階段版本: Flash Player 10, AIR 1.5

在作業期間擲出的錯誤 (若錯誤存在)。如果在作業期間發生錯誤,錯誤物件的參照會附加到 FLOW_OPERATION_END 事件。這讓您在 Flash Player 擲出錯誤之前,有處理錯誤的機會。如果您取消事件,Flash Player 將不會擲出錯誤。



實作
    public function get error():Error
    public function set error(value:Error):void

level

屬性 
level:int

語言版本: ActionScript 3.0
執行階段版本: Flash Player 10, AIR 1.5

多個作業經由巢狀結構可合併為複合作業。此旗標描述作業的巢狀層級。



實作
    public function get level():int
    public function set level(value:int):void

operation

屬性 
operation:FlowOperation

語言版本: ActionScript 3.0
執行階段版本: Flash Player 10, AIR 1.5

即將開始或剛結束的作業。



實作
    public function get operation():FlowOperation
    public function set operation(value:FlowOperation):void

相關 API 元素

建構函式詳細資料

FlowOperationEvent

()建構函式
public function FlowOperationEvent(type:String, bubbles:Boolean = false, cancelable:Boolean = false, operation:FlowOperation = null, level:int = 0, error:Error = null)

語言版本: ActionScript 3.0
執行階段版本: Flash Player 10, AIR 1.5

建立包含流程作業資訊的事件物件。

參數
type:String — 事件類型。事件偵聽程式可以透過繼承的 type 屬性來存取此資訊。有兩種類型:FlowOperationEvent.FLOW_OPERATION_BEGINFlowOperationEvent.FLOW_OPERATION_END
 
bubbles:Boolean (default = false) — 指示事件是否為反昇事件。此事件不反昇。
 
cancelable:Boolean (default = false) — 指出是否可避免與事件相關聯的行為指令。您可以在事件處理常式函數中,呼叫 Event.preventDefault() 方法以取消此事件。
 
operation:FlowOperation (default = null) — 即將開始或剛結束的 FlowOperation。
 
level:int (default = 0) — 在作業期間產生的任何錯誤。
 
error:Error (default = null)
常數詳細資訊

FLOW_OPERATION_BEGIN

常數
public static const FLOW_OPERATION_BEGIN:String = "flowOperationBegin"

語言版本: ActionScript 3.0
執行階段版本: Flash Player 10, AIR 1.5

定義 flowOperationBegin 事件物件的 type 屬性值。在作業執行前傳送。取消此事件將阻止作業。

FLOW_OPERATION_COMPLETE

常數 
public static const FLOW_OPERATION_COMPLETE:String = "flowOperationComplete"

語言版本: ActionScript 3.0
執行階段版本: Flash Player 10, AIR 1.5

定義 flowOperationComplete 事件物件的 type 屬性值。完成所有作業 (包括擱置與複合作業)、完成撰寫且捲動顯示之後進行傳送。

FLOW_OPERATION_END

常數 
public static const FLOW_OPERATION_END:String = "flowOperationEnd"

語言版本: ActionScript 3.0
執行階段版本: Flash Player 10, AIR 1.5

定義 flowOperationEnd 事件物件的 type 屬性值。在作業完成後傳送。任何錯誤都儲存在 OperationEvent.error。如果有錯誤,取消此事件會阻止重新擲出錯誤。一般而言,所有錯誤都可能是嚴重的。

在此時 (執行作業之後) 變更作業可能失敗。

FlowOperationEvent_example.as

這個範例會顯示如何建立一個事件處理程式,用於偵聽文字方向操作的開始與結束。兩個主要步驟是在文字流排上呼叫 addEventListener() 方法,以及建立事件處理常式函數。

已經為 TextFlow 實體呼叫 addEventListener() 。您可以分別使用這個簡易字串 "flowOperationBegin""flowOperationEnd",但是最好是使用靜態常數 FlowOperationEvent.FLOW_OPERATION_BEGINFlowOperationEvent.FLOW_OPERATION_END

本範例中的事件處理常式函數稱為 opBeginHandler()opEndHandler()opBeginHandler() 方法會使用 trace() 函數來產生一種追蹤陳述式,用來指示已經開始貼上作業。opEndHandler() 方法也會使用 trace() 函數,不過只會在發生錯誤時產生追蹤陳述式。

package flashx.textLayout.events.examples
{
    import flash.display.Sprite;
    
    import flashx.textLayout.compose.StandardFlowComposer;
    import flashx.textLayout.container.ContainerController;
    import flashx.textLayout.conversion.TextConverter;
    import flashx.textLayout.edit.EditManager;
    import flashx.textLayout.elements.TextFlow;
    import flashx.textLayout.events.FlowOperationEvent;
    import flashx.textLayout.operations.FlowOperation;
    import flashx.textLayout.operations.PasteOperation;
    import flashx.undo.UndoManager;

    public class FlowOperationEvent_example extends Sprite
    {
        private var inputContainer:Sprite;
        private var inputTextFlow:TextFlow;
        private var inputController:ContainerController;
        private var inputEditManager:EditManager;
        private var inputUndoManager:UndoManager;

        public function FlowOperationEvent_example()
        {
            var replaceText:String = "paste text here";
            inputTextFlow = new TextFlow();

            inputContainer = new Sprite();
            inputContainer.x = 30;
            inputContainer.y = 100;

             this.stage.addChild( inputContainer );

            inputController = new ContainerController(inputContainer, 225, 20);
            inputController.verticalScrollPolicy = flashx.textLayout.container.ScrollPolicy.OFF;

            inputTextFlow = TextConverter.importToFlow(replaceText, TextConverter.PLAIN_TEXT_FORMAT);
            inputTextFlow.flowComposer = new StandardFlowComposer(); 
            inputTextFlow.flowComposer.addController(inputController);

            inputUndoManager = new UndoManager();
            inputEditManager = new EditManager(inputUndoManager);
            inputTextFlow.interactionManager = inputEditManager;

            inputTextFlow.addEventListener(FlowOperationEvent.FLOW_OPERATION_BEGIN, opBeginHandler);
            inputTextFlow.addEventListener(FlowOperationEvent.FLOW_OPERATION_END, opEndHandler);
            inputTextFlow.flowComposer.updateAllControllers();
        }

        private function opBeginHandler(evt:FlowOperationEvent):void { 
            var flowOp:FlowOperation = evt.operation; 
            if(flowOp is PasteOperation) {
                trace("You can cancel or modify the paste operation in this event handler.");
            }
        }

        private function opEndHandler(evt:FlowOperationEvent):void { 
            var flowOp:FlowOperation = evt.operation; 
            if(evt.error) {
                trace("You can handle the error here and call preventDefault().");
            }
        }
    }
}




[ X ]為什麼顯示英文?
「ActionScript 3.0 參考」的內容是以英文顯示

並非所有「ActionScript 3.0 參考」的內容都翻譯為所有語言。當語言元素未翻譯時,就會以英文顯示。例如,ga.controls.HelpBox 類別並沒有翻譯為任何語言。因此在參考的繁體中文版本中,ga.controls.HelpBox 類別就會以英文顯示。